1. V. C. Farmer, Miner. Soc. Monograph., 15 (1974) 331.
2. H. Hayashi and K. Oinuma, Am. Mineral., 50 (1965) 476; Am. Mineral, 52 (1967) 1206.
3. H. Shirozu and K. Ishida, Miner. J., 11 (1982) 161.
4. H. Shirozu, Clay Sci., 6 (1985) 167.
5. A. C. Prieto, J. Dubessy, M. Cathelineau and F. Rull, Boll. Soc. Esp. Miner., 13 (1990) 25.